I know WordPress runs ad-sense, and that I can purchase the No-Ads upgrade to get rid of them once and for all - but outside of that option, is it possible for me to control what types of ads are presented in my blog? For example, today, there was an ad for an e-cigarrette in my blog. I'd rather not have such ads there.. not to mention anything that could be interpreted as sexual, or racist. Any way to filter them, or block certain types of ads - or is my only option to cough up the $30/year for the full block?
The blog I need help with is onforeignground.wordpress.com.